Winoow-sash fastener



E. OALDERVVOOD, OF PORTLAND, MAINE.

'wiuoow-sAsl-i FASTENER.

Specification forming part of Letters Patent No. 5ll,9l8, dated January9, 1866 anteaated January 3, 1866. l

To all whom 'it may concern:

Be it known that I, E. CALDERWOOD, ot' Portland, in the county ot`Cumberland and State of Maine, have invented new-and useful Improvementsin Window-Sash Fasteners; and I do hereby .declare that the following isafull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specitication.

The present invention consists in producing suteient friction betweenthe sash and window frames that as the sash-frames'are raised or loweredthereon they can be retained at any desired height by means ot' a datmetallic sp1-ing inserted iu each side of thersashIframesV in conta-ctwith the window-frame, and in the longest direction thereof, of nearlythe same length as sashframe, and lheld at each end but free in thecenter, against which springs pressure to any desired degree is brought`to bear, causing them to bind against the sides of the window-frame, bymeans of rubber springs and thumb-'screws inserted in the properposit-ions ot' the sash-frames.

In the accompanying plate of drawings my improvements are represented,Figure Ibeing a view of the inner side of the window and sash frameswhen the latter are secured within the former; Fig. 2, a centralverticalsection in plane of line x fr, Fig. l; Fig. V3, a detail view ofsash-frame.

a, a in the drawings represent a-w1ndow frame made in any of theordinary modes and of `any suitable material b b its sill, and c c itsupright pieces, and d d its top piece.

Within and between the inner facesof the window-frame the upper andlower sashframes, f and g, one above and back ot' the other, areinserted, as ordinarily, and retained in their proper positions by thenarrow wooden strips h It generally employed therefor, which strips arefastened to and ,upon the windowi'ranies by thumb-screws l l, &e., so asto allow the sash -t'rames to be readily removed for cleaning` orresetting' the glass thereof if any should be broken.

To holdthe sash-frames tightly together when the windows are closed, andto prevent them from being opened from the outside, l placeeupor eachofthe two frames, and at their edge` ,n contact with each other, aprojecting standard, m lm., through which a thnm bscrew', n, is passed,by the turning or" which to the right or let'tit either holds the twoframes together or. releases them from each other, according as may bedesired.

In lieu of using the standardsior a hearing for the thumb-screw, itinay-bepassed directly and in lieu of only through the sashframes, onethumb-screw two -or more may be' used, it' desired. l

In the side o of sash-frame, (see Fig. 1,) and in a groove, p, thereof',is aliat metallic spring, r, placed lengthwise in fthe same,au'd'seetl'red"at"encheml by pins, rivets, or in any other proper proper1 manner, but free lo play in the center. Upon the inner face, and atthe center of the spring, is' placed a rubber cushion, s, upon the end tof which bears the inner end ot' a thu1nb-screw,o, of the sashframe. lyturning the thumb-screw e to the right or .left the rubber spring orcushion causes the metallic spring to be either thrown out or in, andthus brought td bear with more or less pressure upon thewiiidowfran1e,as may be desired, whereby the sash-frame, as moved up ordown, caube're'tained and held at any height wished. A similar metallicspring is also inserted in the side zo ot' sashframef, which is operatedupon the same as described for spring o, by the thumb-screw y thereof.could beinserted -in the opposite sides ot' their respect-ivesash-frames; but I deem one in each frame sufficient for the ordinarysizes thereof'.

I claim as new and desire to secure by Letters Patent- The metallic'strip i', inserted within the side of the sash-frames o, in combination witha thumb-screw, o, being arranged together and operating substantially asherein described and for the purpose specilied.

EZRA UALDERWOOD.

Also, if desired or necessary, they

